Fifty two adults (18-70 years old), with mid-Achilles tendon pain will be randomised to standard treatment (180 repetitions) or to a group where individuals are allowed to do what they can. Participants will be recruited from participating physiotherapy departments (health centres and hospital departments) across NHS Forth Valley. All individuals will be required to complete the same type of eccentric exercise for six weeks attending an initial assessment and two follow-up appointments at three and six weeks. Thereafter participants will be discharged if better, or continue with individual care where appropriate.